<template>
  <div>
    <!-- 面包屑 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片区 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="showCateDialog">添加分类</el-button>
        </el-col>
      </el-row>
    </el-card>

    <!-- 表格 -->
    <tree-table
      :data="catelist"
      :columns="columns"
      :selection-type="false"
      :expand-type="false"
      show-index
      index-text="#"
      border
      :show-row-hover="false"
    >
      <!-- 是否有效 -->
      <template slot-scope="scope" slot="isok">
        <i
          class="el-icon-success"
          v-if="scope.row.cat_deleted == false"
          style="color: lightgreen"
        >
        </i>
        <i class="el-icon-error" v-else style="color: red"> </i>
      </template>
      <!-- 排序 -->
      <template slot-scope="scope" slot="order">
        <el-tag size="mini" v-if="scope.row.cat_level == 0">一级</el-tag>
        <el-tag size="mini" v-else-if="scope.row.cat_level == 1" type="success">二级</el-tag>
        <el-tag size="mini" v-else type="warning">三级</el-tag>
      </template>
      <!-- 操作 -->
      <template slot-scope="scope" slot="opt">
        <el-button type="primary" icon="el-icon-edit" size="mini"
          >编辑</el-button
        >
        <el-button type="danger" icon="el-icon-delete" size="mini"
          >删除</el-button
        >
      </template>
    </tree-table>

    <!-- 分页 -->
    <el-pagination
      @size-change="handleSizeChange"
      @current-change="handleCurrentChange"
      :current-page="querInfo.pagenum"
      :page-sizes="[3, 5, 10, 15]"
      :page-size="querInfo.pagesize"
      layout="total, sizes, prev, pager, next, jumper"
      :total="total"
    >
    </el-pagination>

    <!-- 添加分类对话框 -->
    <el-dialog
      title="添加分类"
      :visible.sync="addCateDialogVisible"
      width="50%"
      @close="addCateDialogClosed"
    >
      <div slot="footer">
        <el-form
          :model="addCateForm"
          :rules="addCateFormRules"
          ref="addCateFormRef"
          label-width="100px"
        >
          <el-form-item label="分类名称:" prop="cat_name">
            <el-input v-model="addCateForm.cat_name"></el-input>
          </el-form-item>

          <el-form-item label="父级分类:">
            <!-- 级联选择器 -->
            <el-cascader
              v-model="selectedKeys"
              :options="parentCateList"
              :props="{
                expandTrigger: 'hover',
                value: 'cat_id',
                label: 'cat_name',
                children: 'children',
              }"
              @change="parentCateChange"
              clearable
              change-on-select
            ></el-cascader>
          </el-form-item>

          <el-button @click="addCateDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addCate">确 定</el-button>
        </el-form>
      </div>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      querInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5,
      },
      catelist: [],
      total: 0,
      columns: [
        {
          label: "分类名称",
          prop: "cat_name",
        },
        {
          label: "是否有效",
          type: "template",
          template: "isok",
        },
        {
          label: "排序",
          type: "template",
          template: "order",
        },
        {
          label: "操作",
          type: "template",
          template: "opt",
        },
      ],
      addCateDialogVisible: false,
      addCateForm: {
        cat_name: "",
        cat_pid: 0,
        cat_level: 0,
      },
      addCateFormRules: {
        cat_name: [{ required: true, message: "请输入名称", trigger: "blur" }],
      },
      parentCateList: [],
      selectedKeys: [],
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get("categories", {
        params: this.querInfo,
      })
      if (res.meta.status !== 200) {
        return this.$message.error("获取分类列表失败")
      }
      console.log(res)
      this.catelist = res.data.result
      this.total = res.data.total
    },
    handleSizeChange(newsize) {
      this.querInfo.pagesize = newsize
      this.getCateList()
    },
    handleCurrentChange(newpage) {
      this.querInfo.pagenum = newpage
      this.getCateList()
    },
    showCateDialog() {
      this.getParentCateList()
      this.addCateDialogVisible = true
    },
    async getParentCateList() {
      const { data: res } = await this.$http.get("categories", {
        params: { type: 2 },
      })
      if (res.meta.status !== 200) {
        return this.$message.error("获取失败")
      }
      console.log(res)
      this.parentCateList = res.data
    },
    parentCateChange() {
      console.log(this.selectedKeys)
      if (this.selectedKeys.length > 0) {
        this.addCateForm.cat_pid = this.selectedKeys[
          this.selectedKeys.length - 1
        ]
        this.addCateForm.cat_level = this.selectedKeys.length
        return
      } else {
        this.addCateForm.cat_pid = 0
        this.addCateForm.cat_level = 0
      }
    },
    addCate() {
      console.log(this.addCateForm)
      this.$refs.addCateFormRef.validate(async valid => {
        if(!valid) return
        const {data: res} = await this.$http.post('categories',this.addCateForm)
        if(res.meta.status !==201) {
          return this.$$message.error('请求失败')
        }
        this.$message.success('添加成功')
        this.getCateList()
        this.addCateDialogVisible = false

      })
    },
    addCateDialogClosed() {
      this.$refs.addCateFormRef.resetFields()
      this.selectedKeys = []
      this.addCateForm.cat_level = 0
      this.addCateForm.cat_pid = 0
    },
  },
}
</script>

<style lang="less" scoped>
</style>